[shellcheck] Disable SC2317 in comm-dev.sh

Summary:
Fixes CI shellcheck failure.
Shellcheck 0.9.0 has been released and it has a new check SC2317 enabled by default
which caused CI to fail. This check is not available in 0.8.0 which is the version
we use locally.

Test Plan: Ensured both shellcheck 0.8.0 and 0.9.0 pass locally. Ran CI.

Reviewers: jon, atul

Reviewed By: jon

Subscribers: ashoat, tomek

Differential Revision: https://phab.comm.dev/D8181